// jQuery Alert Dialogs Plugin
//
// Version 1.1
//
// Cory S.N. LaViska
// A Beautiful Site (http://abeautifulsite.net/)
// 14 May 2009
//
// Visit http://abeautifulsite.net/notebook/87 for more information
//
// Usage:
//		jAlert( message, [title, callback] )
//		jConfirm( message, [title, callback] )
//		jPrompt( message, [value, title, callback] )
//
// History:
//
//		1.00 - Released (29 December 2008)
//
//		1.01 - Fixed bug where unbinding would destroy all resize events
//
// License:
//
// This plugin is dual-licensed under the GNU General Public License and the MIT License and
// is copyright 2008 A Beautiful Site, LLC.
//
(function ($) {
  $.alerts = {
    // These properties can be read/written by accessing $.alerts.propertyName from your scripts at any time

    verticalOffset: -75, // vertical offset of the dialog from center screen, in pixels
    horizontalOffset: 0, // horizontal offset of the dialog from center screen, in pixels/
    repositionOnResize: true, // re-centers the dialog on window resize
    overlayOpacity: 0.01, // transparency level of overlay
    overlayColor: "#FFF", // base color of overlay
    draggable: true, // make the dialogs draggable (requires UI Draggables plugin)
    okButton: "确认", // text for the OK button
    cancelButton: "&nbsp;Cancel&nbsp;", // text for the Cancel button
    dialogClass: null, // if specified, this class will be applied to all dialogs

    // Public methods

    alert: function (message, title, callback) {
      if (title == null) title = "提示";
      $.alerts._show(title, message, null, "alert", function (result) {
        if (callback) callback(result);
      });
    },

    confirm: function (message, title, callback) {
      if (title == null) title = "Confirm";
      $.alerts._show(title, message, null, "confirm", function (result) {
        if (callback) callback(result);
      });
    },

    prompt: function (message, value, title, callback) {
      if (title == null) title = "Prompt";
      $.alerts._show(title, message, value, "prompt", function (result) {
        if (callback) callback(result);
      });
    },

    // Private methods

    _show: function (title, msg, value, type, callback) {
      $.alerts._hide();
      $.alerts._overlay("show");

      $("BODY").append(
        '<div id="popup_container">' +
          '<h1 id="popup_title"></h1>' +
          '<div id="popup_content">' +
          '<div id="popup_message"></div>' +
          "</div>" +
          "</div>"
      );

      if ($.alerts.dialogClass)
        $("#popup_container").addClass($.alerts.dialogClass);

      // IE6 Fix
      var pos = "fixed";

      $("#popup_container").css({
        position: pos,
        zIndex: 99999,
        padding: 0,
        margin: 0,
      });

      $("#popup_title").text(title);
      $("#popup_content").addClass(type);
      $("#popup_message").text(msg);
      $("#popup_message").html(
        $("#popup_message").text().replace(/\n/g, "<br />")
      );

      $("#popup_container").css({
        minWidth: $("#popup_container").outerWidth(),
        maxWidth: $("#popup_container").outerWidth(),
      });

      $.alerts._reposition();
      $.alerts._maintainPosition(true);

      switch (type) {
        case "alert":
          $("#popup_message").after(
            '<div id="popup_panel"><div id="popup_ok">' +
              $.alerts.okButton +
              "</div>"
          );
          $("#popup_ok").click(function () {
            $.alerts._hide();
            callback(true);
          });
          $("#popup_ok")
            .focus()
            .keypress(function (e) {
              if (e.keyCode == 13 || e.keyCode == 27)
                $("#popup_ok").trigger("click");
            });
          break;
        case "confirm":
          $("#popup_message").after(
            '<div id="popup_panel"><input type="button" value="' +
              $.alerts.okButton +
              '" id="popup_ok" /> <input type="button" value="' +
              $.alerts.cancelButton +
              '" id="popup_cancel" /></div>'
          );
          $("#popup_ok").click(function () {
            $.alerts._hide();
            if (callback) callback(true);
          });
          $("#popup_cancel").click(function () {
            $.alerts._hide();
            if (callback) callback(false);
          });
          $("#popup_ok").focus();
          $("#popup_ok, #popup_cancel").keypress(function (e) {
            if (e.keyCode == 13) $("#popup_ok").trigger("click");
            if (e.keyCode == 27) $("#popup_cancel").trigger("click");
          });
          break;
        case "prompt":
          $("#popup_message")
            .append('<br /><input type="text" size="30" id="popup_prompt" />')
            .after(
              '<div id="popup_panel"><input type="button" value="' +
                $.alerts.okButton +
                '" id="popup_ok" /> <input type="button" value="' +
                $.alerts.cancelButton +
                '" id="popup_cancel" /></div>'
            );
          $("#popup_prompt").width($("#popup_message").width());
          $("#popup_ok").click(function () {
            var val = $("#popup_prompt").val();
            $.alerts._hide();
            if (callback) callback(val);
          });
          $("#popup_cancel").click(function () {
            $.alerts._hide();
            if (callback) callback(null);
          });
          $("#popup_prompt, #popup_ok, #popup_cancel").keypress(function (e) {
            if (e.keyCode == 13) $("#popup_ok").trigger("click");
            if (e.keyCode == 27) $("#popup_cancel").trigger("click");
          });
          if (value) $("#popup_prompt").val(value);
          $("#popup_prompt").focus().select();
          break;
      }

      // Make draggable
      if ($.alerts.draggable) {
        try {
          $("#popup_container").draggable({ handle: $("#popup_title") });
          $("#popup_title").css({ cursor: "move" });
        } catch (e) {
          /* requires jQuery UI draggables */
        }
      }
    },

    _hide: function () {
      $("#popup_container").remove();
      $.alerts._overlay("hide");
      $.alerts._maintainPosition(false);
    },

    _overlay: function (status) {
      switch (status) {
        case "show":
          $.alerts._overlay("hide");
          $("BODY").append('<div id="popup_overlay"></div>');
          $("#popup_overlay").css({
            position: "absolute",
            zIndex: 99998,
            top: "0px",
            left: "0px",
            width: "100%",
            height: $(document).height(),
            background: $.alerts.overlayColor,
            opacity: $.alerts.overlayOpacity,
          });
          break;
        case "hide":
          $("#popup_overlay").remove();
          break;
      }
    },

    _reposition: function () {
      var top =
        $(window).height() / 2 -
        $("#popup_container").outerHeight() / 2 +
        $.alerts.verticalOffset;
      var left =
        $(window).width() / 2 -
        $("#popup_container").outerWidth() / 2 +
        $.alerts.horizontalOffset;
      if (top < 0) top = 0;
      if (left < 0) left = 0;

      $("#popup_container").css({
        top: top + "px",
        left: left + "px",
      });
      $("#popup_overlay").height($(document).height());
    },

    _maintainPosition: function (status) {
      if ($.alerts.repositionOnResize) {
        switch (status) {
          case true:
            $(window).bind("resize", $.alerts._reposition);
            break;
          case false:
            $(window).unbind("resize", $.alerts._reposition);
            break;
        }
      }
    },
  };

  // Shortuct functions
  jAlert = function (message, title, callback) {
    $.alerts.alert(message, title, callback);
  };

  jConfirm = function (message, title, callback) {
    $.alerts.confirm(message, title, callback);
  };

  jPrompt = function (message, value, title, callback) {
    $.alerts.prompt(message, value, title, callback);
  };
})(jQuery);
